Process of producing black or dark carbonaceous pigments.



Patented March 21, 1905.

PATENT ()EEIcE.

DAVID J. OGILVY, OF CINCINNATI, OHIO.-

PROCESS OF PRODUCING BLACK OR DARK CARBONACEOUS PIGMENTS.

SPECIFICATION forming part of Letters Patent No. 785,697, dated March21, 1905.

Original application filed August 13, 1897, Serial No- 648,16'7. Dividedand this application filed July 28, 1902. Serial No. 117,393.

To (0 10700777, it may concern:

Be itknown that I, DAVID J. OGILVY, a citi-' Zen of the UnitedStatesfiand a resident of the city of Cincinnati, in the county ofHamilton and State of Ohio, have invented a new and useful Process, ofProducing Black or Dark Carbonaceous Pigments, of which the following isa specification, the same being a division of the application, SerialNo. 6 l8,167, filed August 13, 1897.

The object of this process is to produce economically and conveniently asuperior quality of black and dark pigments. This object I attain byproducing from any suitable material a carbonaceous flame and impingethe flame on water or an aqueous surface, which results in acarbonaceousdeposit on the water.

The carbonaceous flame is produced on a stationary source from naturalor artificial hydrocarbons, solid, liquid, or gaseous, and the flamewhen produced is then directed so that it will strike or impinge at anyproper angle and distance (so as to bestow the most satisfactoryresults) on the Water or aqueous surface in a quiet condition on whichit strikes. The Water may be of any proper temperature and of anydesired purity and in a condition substantially stationary.

In the case of a stationary flame impinging on a stationary aqueoussurface the operation commences by allowing a carbonaceous flame tostrike on an aqueous surface, which results in an initial deposit ofcarbonaceous pigment.

The deposit keeps increasing on the carbonaceous surface until thedeposit sinks of its own weight or is removed by other means, therebyexposing a fresh aqueous surface.

By the term stationary as applied to the flame is not meant a flamewhose constituents furnishing combustion do not move, for in thecombustion of gas, &c., such a movement necessarily occurs; but by theterm stationary flame is meant one where the part from which the flamereceives its supply of carbon,

85c. is stationary.

By the term stationary as applied to the water on which the flameimpinges I mean water which is at rest, except so far as the impingementof the flame or the atmosphere or varying temperature or the sinking ofthe carbon through the water or mechanical means for removing the carbonmay impart thereto a slight motion. These motions are necessarilyincident to the operation.

As the carbonaceous deposits are often repellent in their dispositiontoward water, there may when desired be added to the water which isnecessary in the operation substances which reduce or overcome therepellent nature of the deposit toward the water and which facilitatesthe miscibility of the deposit and the water. Among such substances arepotassium and sodium hydroxide and carbonates, ammonia and ammoniumchlorid, acetic acid and acetates of potassium and sodium, phenic acid,sugar, &c. For most purposes a dilute solution of sodium h ydroxid issuflicient.

From the foregoing explanations it is obvious that there are numerousmethods in which the general principles of my invention may be ap plied.

The simplest and most easily illustrated working example of myimprovements is merely to allow the flame from a stationary inverted jetof gas to strike or impinge on water in a stationary condition atordinary temperature. Thereupon a deposit of carbonaceous pigment willbe produced which may be separated by filtration, &c., and can be usedin a moist or dried form, as desired.

The foregoing illustrative description suggests in a limited mannertheprinciple of my invention. The number of apparatus that may be utilizedfor operating this invention are numerous.

Among the advantages of my improved process are the following: Metallicscrapers are unnecessary for removing the deposit, as the carbon beingcollected on a wet surface is easily removed by a bath, spray, &c. Theprocess may be conducted continuously, as

the carbon deposit may be removed while the process is in operation. Thecarbonaceous deposit may be conveniently handled with pumpingappliances, as it is easy to have it 1 in a semifluid condition of anydesired consistency. Therefore from ahygienic view this is a decidedimprovement over the old methods of making lump and carbon blacks.

What I claim as new and of my'invention, and desire to secure by LettersPatent, is- 1. The process of producing black or darkcoloredcarbonaceous deposits, by impinging carbonaceous flame (produced on astationary source) on Water in astationary or quiet con- 10 dition.

2. The process of producing black and darkcolored deposits by impingingcarbonaceous flames, produced on a stationary source, on Water in aquiet or stationary condition, said Water containing suitable materialwhereby the repellent nature of the carbonaceous deposit toward theWater is overcome.

DAVID J. OGILVY.

Attest:

D. (J. KELLER, CHARLES Gr. SPIEGEL.

